Readout and signal processing electronics for 2×2 CZT detectors in parallel

Author

Shi, Zhubin ; Sang, Wenbin ; Qian, Yongbiao ; Teng, Jianyong ; Min, Jiahua ; Fan, Jianrong

Author_Institution

Sch. of Mater. Sci. & Eng., Shanghai Univ., Shanghai, China

fYear

2008

fDate

20-23 Oct. 2008

Firstpage

992

Lastpage

995

Abstract

In this paper, the readout system for 2Ã—2 CdZnTe (CZT) detectors in parallel was designed and fabricated with analog electronics. The equivalent noise with this readout system was in the range of 223 electrons RMS for C_d=0 pF to 1785 electrons RMS for C_d=330 pF. The output signal of the preamplifier was about 130 mV, the signal duration was about 0.2 ms and the signal rise time was about 900 ns, when the CZT detector biased at -1250 V was exposed to the radiation source ¹³⁷Cs (662 keV)with the shaping time of 2.2 us. The ratio of signal to noise (SNR) is about 27:1, after the signal through summing circuit.

Keywords

detector circuits; readout electronics; CZT detector; CdZnTe; SNR; analog electronics; equivalent noise; preamplifier; readout system; signal processing electronics; signal to noise ratio; time 0.2 mus; time 2.2 mus; time 900 ns; voltage 1250 V; voltage 130 mV; Detectors; Electrons; Preamplifiers; Semiconductor device noise; Sensor arrays; Signal design; Signal processing; Signal to noise ratio; Spectroscopy; Summing circuits;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State and Integrated-Circuit Technology, 2008. ICSICT 2008. 9th International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-2185-5

Electronic_ISBN

978-1-4244-2186-2

Type

conf

DOI

10.1109/ICSICT.2008.4734711

Filename

4734711